Backup mode with the KOSTAL BackUp Switch

The KOSTAL BackUp Switch is a manual switch from KOSTAL. The steps described here relate specifically to this type.

If another backup box has been fitted, consult the manufacturer's instructions to find out how it is operated.

The backup function must be activated during initial commissioning or by changing the operating mode in the inverter. Depending on the hardware installed, you can choose between the manual KOSTAL BackUp Switch and an automatic backup box. This setting can only be configured by an installer.

Procedure using the KOSTAL Backup Switch if there is a grid failure

  1. As soon as the public grid fails, you will receive an event message on the inverter.
  2. Inverter display message:
    The public grid has failed. Please change over to backup mode.
  3. The red LED on the inverter lights up for a fault.
  4. The following event messages are displayed on the status line:
    - 6021 (The public grid has failed. The inverter is ready to start backup mode.)
    - 6006 (Sensor information cannot be retrieved)
  5. Change over to backup mode (house) on the KOSTAL Backup Switch.
  7. The inverter establishes a backup power network. It takes max. 5 seconds for the backup mode to start.
  8. The red and green LEDs light up on the inverter.
  9. The following event message is displayed on the status line:
    Backup mode.
  1. Backup mode active.

What are the required steps if the inverter shuts down when there is an overload?

If there is an overload, the inverter tries to establish a backup power network three times before it shuts down.

The inverter display then shows a message that the load should be reduced.

  1. Shut down consumers in the house grid to reduce the load.
  2. Acknowledge the message on the display.
  3. The inverter now tries to establish a backup power network again.

If it is still not possible to establish a backup power network, reduce the consumers further.

Do not switch the inverter off in backup mode if PV energy is no longer available. The inverter cannot establish a connection to the battery if it has been switched off because there are only a few battery types (e.g. BYD) that supply the inverter's communication board with energy.

Procedure using the KOSTAL Backup Switch when the grid returns

The KOSTAL Smart Energy Meter measures the grid parameters for the public grid at the grid connection point. As soon as the grid is available again, the KOSTAL Smart Energy Meter forwards this information to the inverter.

  1. As soon as the public grid is available again, you will receive an event message on the inverter display.
  2. The red LED on the inverter goes off.
  3. After approx. 60 seconds, the following message appears on the inverter display:
    The public grid is available again. Please switch to grid mode.
  4. Change over to grid mode (power pylon) on the KOSTAL Backup Switch.
  6. All consumers are immediately connected to the public grid again and can be used.
  7. The inverter starts up again after approx. 90 seconds, depending on the grid guidelines, and can feed in to the public grid again.
  8. The green LED lights up on the inverter.
  1. Grid mode is active again.